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Bulalakaw

Isang larawan ng isang bahagi ng himpapawid habang nagkakaroon ng pag-ulan ng bulalakaw.
Isang perseid na bulalakaw at ang Milky Way

Ang bulalakaw,[1] bituing-alpas o meteoroyd[n 1] ay isang maliit na mabato o metalikong bagay sa kalawakan. Nabubuo ang bulalakaw dahil sa pagbabangaan ng mga planeta at ang ilan sa mga ito ay nakakapasok sa Daigdig o sa ibang planeta.

Sa Ingles, tinatawag itong meteoroid na isang katawagan para sa mga partikulong sinlaki ng buhangin hanggang malalaking bato (hanggang isang metro ang haba[2]) na makikita sa Sistemang Solar.[3][4] Lubhang mas maliit ang meteoroid sa asteroyd.[2] Tinatawag na meteor ang nakikitang daanan ng isang meteoroid na pumapasok sa himpapawid ng mundo (o sa ibang himpapawid ng ibang planeta).[5] Sa Tagalog, tinatawag na "bulalakaw" ang parehong meteor at meteoroid. Tinatawag din minsan ang parehong asteroyd at kometa bilang "bulalakaw."[6] Kung ang isang bulalakaw ay nakaabot sa lupa at nakaligtas sa pagsabog, tinatawag na itong meteorite o taeng-bituin.

  1. Maaring baybayin na metyoroyd

Mga sanggunian

[baguhin | baguhin ang wikitext]
  1. English, Leo James. Diksyunaryong Tagalog-Ingles, Kongregasyon ng Kabanalbanalang Tagapag-ligtas, Maynila, ipinamamahagi ng National Book Store, may 1583 na mga dahon, ISBN 971910550X
  2. 2.0 2.1 Rubin, Alan E.; Grossman, Jeffrey N. (Enero 2010). "Meteorite and meteoroid: New comprehensive definitions". Meteoritics & Planetary Science (sa wikang Ingles). 45 (1): 114–122. Bibcode:2010M&PS...45..114R. doi:10.1111/j.1945-5100.2009.01009.x.((cite journal)): CS1 maint: date auto-translated (link))
  3. Millman P.M. (1961). "A report on meteor terminology". JRASC (sa wikang Ingles). 55: 265–267. Bibcode:1961JRASC..55..265M.((cite journal)): CS1 maint: date auto-translated (link)
  4. Glossary International Meteor Organization (sa Ingles)
  5. Beech, M.; [Steel, D. I. (Setyembre 1995). "On the Definition of the Term Meteoroid". Quarterly Journal of the Royal Astronomical Society (sa wikang Ingles). 36 (3): 281–284. Bibcode:1995QJRAS..36..281B.((cite journal)): CS1 maint: date auto-translated (link)
  6. Bernardo, Ramon (Nobyembre 16, 2014). "Misteryo ng bulalakaw mabubuksan?". Pang-masa. The Philippine Star. Nakuha noong Pebrero 6, 2019.((cite news)): CS1 maint: date auto-translated (link)
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Bulalakaw
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